Business IT infrastructure is becoming increasingly complex with an ever increasing dependency on a continuity of service and therefore no loss of production.

Servers, Routers, Switches, Firewalls, Networks and Data Storage are just some of the many components of an IT Solution, all of which are critical and any will have an impact on a business performance should failure occur.

The solution is the implementation of a failover strategy, of which there are generally four approaches: No Failover, Cold Failover, Warm Failover & Hot Failover. Each strategy has varying lengths of recovery time, expense, and user impact, from a no downtime solution to one based around a recovery time recorded in hours.

There are of course numerous variations on these strategies; for example, many smaller business clients may implement hot failover on their servers only, leaving other key items to be treated according to the predicted impact on the business should a failure occur.

It is important to differentiate between failover and disaster recovery. Failover solutions are implemented to resume system availability in an acceptable period of time, while disaster recovery is not a resumption of existing services guarantee, but a policy to protect a companies data asset (whatever the circumstances) for trading continuation, when systems have been restored.

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